/*

* Copyright (c) 1997-2009 Nokia Corporation and/or its subsidiary(-ies).

* All rights reserved.

* This component and the accompanying materials are made available

* under the terms of "Eclipse Public License v1.0"

* which accompanies this distribution, and is available

* at the URL "http://www.eclipse.org/legal/epl-v10.html".

*

* Initial Contributors:

* Nokia Corporation - initial contribution.

*

* Contributors:

*

* Description:

* Adheres to the UsbMan USB Class Controller API and talks to C32

* to manage the stub2.CSY that is used to provide a virtual

* serial port service to clients

*

*/

/**

 @file

*/

#include "Stub2CC.h"

#include <usb_std.h>

#include <es_ini.h>

#include <d32usbc.h>

#include <usb/usblogger.h>

#ifdef __FLOG_ACTIVE

_LIT8(KLogComponent, "STUB2CC");

#endif

#include "usbmaninternalconstants.h"

// Panic category 

_LIT( Kstub2CcPanicCategory, "Usbstub2Cc" );

/**

 * Panic codes for the USB stub2 Class Controller.

 */

enum Tstub2CcPanic

	{

	/** Class called while in an illegal state */

	EBadApiCall = 0,

	/** Asynchronous function called (not needed, as all requests complete synchronously) */

	EUnusedFunction = 1,

	/** Error reading ini file. */

	EPanicBadIniFile = 2,		

	/** Bad value for the iNumberOfstub2Functions member.*/

	EPanicBadNumberOfstub2Functions = 3,

	EPanicUnexpectedStatus,

	EPanicUnexpectedState

	};

_LIT16(KIfcName, "SubCC 1 Interface");

const TInt KMaxPacketTypeInterrupt = 64;	

const TInt KPollInterval  = 128; 

/**

 * Constructs a CUsbstub2ClassController object

 *

 * @param	aOwner	USB Device that owns and manages the class

 *

 * @return	A new CUsbstub2ClassController object

 */

CUsbstub2ClassController* CUsbstub2ClassController::NewL(

	MUsbClassControllerNotify& aOwner)

	{

	CUsbstub2ClassController* r = new (ELeave) CUsbstub2ClassController(aOwner);

	CleanupStack::PushL(r);

	r->ConstructL();

	CleanupStack::Pop();

	return r;

	}

/**

 * Destructor

 */

CUsbstub2ClassController::~CUsbstub2ClassController()

	{

	Cancel();

	iTimer.Close();

#ifndef __WINS__	

	iLdd.Close();

#endif

	}

/**

 * Constructor.

 *

 * @param	aOwner	USB Device that owns and manages the class

 */

CUsbstub2ClassController::CUsbstub2ClassController(

	MUsbClassControllerNotify& aOwner)

	: CUsbClassControllerPlugIn(aOwner, Kstub2StartupPriority),

	iStartDelay(Kstub2CCDefaultDelay),

	iStopDelay(Kstub2CCDefaultDelay),

	iFailToStart(EFalse),

	iFailToStop(EFalse)	

	{

	iTimer.CreateLocal();

	}

/**

 * 2nd Phase Construction.

 */

void CUsbstub2ClassController::ConstructL()

	{

	//read INI file

	TInt ret;

	CESockIniData* ini = 0;

	_LIT(KIniFile, "c:\\testdata\\config\\stub2cc.ini");

	TRAP(ret, ini=CESockIniData::NewL(KIniFile));	

	if(ret!=KErrNone)		

		return;	

	CleanupStack::PushL(ini);

	TInt val;

	if ((ini->FindVar(_L("0x10203287"),_L("StartDelay"), val)))

		{

		iStartDelay = val;

		}

	if ((ini->FindVar(_L("0x10203287"),_L("StopDelay"), val)))

		{

		iStopDelay = val;

		}

	if ((ini->FindVar(_L("0x10203287"),_L("FailToStart"), val)) && val!=0)

		{

		iFailToStart = ETrue;

		}

	if ((ini->FindVar(_L("0x10203287"),_L("FailToStop"), val)) && val!=0 )

		{

		iFailToStop = ETrue;

		}

	CleanupStack::PopAndDestroy(ini);						

	}

/**

 * Called by UsbMan when it wants to start the USB stub2 class. This always

 * completes immediately.

 *

 * @param aStatus The caller's request status, filled in with an error code

 */

void CUsbstub2ClassController::Start(TRequestStatus& aStatus)

	{

	LOG_FUNC

	aStatus = KRequestPending;

	iReportStatus = &aStatus;

	//If we are already started then just complete the request.

	if (iState == EUsbServiceStarted)

		{

		User::RequestComplete(iReportStatus, KErrNone);

		return;

		}

	if (iFailToStart)

		{

		User::RequestComplete(iReportStatus, KErrGeneral);

		return;

		}

	iState = EUsbServiceStarting;

#ifndef __WINS__	

	TInt ret = iLdd.Open(0);

	LOGTEXT2(_L8("Open LDD, ret=%d"), ret);

	ret = SetUpInterface();

	LOGTEXT2(_L8("SetUpInterface(), ret=%d"), ret);

#endif	

	iTimer.After(iStatus, iStartDelay*1000);  //convert from usec to msec

	SetActive();

	}

/**

 * Called by UsbMan when it wants to stop the USB stub2 class.

 *

 * @param aStatus The caller's request status: always set to KErrNone

 */

void CUsbstub2ClassController::Stop(TRequestStatus& aStatus)

	{

	LOG_FUNC

	aStatus = KRequestPending;

	iReportStatus = &aStatus;

	//If we are already idle then just complete the request.

	if (iState == EUsbServiceIdle)

		{

		User::RequestComplete(iReportStatus, KErrNone);

		return;

		}

	if (iFailToStop)

		{

		User::RequestComplete(iReportStatus, KErrGeneral);

		return;

		}

	iState = EUsbServiceStopping;

#ifndef __WINS__	

	iLdd.Close();

#endif

	iTimer.After(iStatus, iStopDelay*1000);  //convert from usec to msec

	SetActive();

	}

/**

 * Gets information about the descriptor which this class provides.

 *

 * @param aDescriptorInfo Descriptor info structure filled in by this function

 */

void CUsbstub2ClassController::GetDescriptorInfo(TUsbDescriptor& aDescriptorInfo) const

	{

	LOG_FUNC

	aDescriptorInfo.iLength = Kstub2DescriptorLength;

	aDescriptorInfo.iNumInterfaces = Kstub2NumberOfInterfacesPerstub2Function;

	}

/**

 * Standard active object RunL. 

 */

void CUsbstub2ClassController::RunL()

	{

	LOG_FUNC

	__ASSERT_DEBUG( iStatus == KErrNone, _USB_PANIC(Kstub2CcPanicCategory, EPanicUnexpectedStatus) );

	switch (iState)

		{

		case EUsbServiceStarting:

			iState = EUsbServiceStarted;

			break;

		case EUsbServiceStopping:

			iState = EUsbServiceIdle;

			break;

		default:	

			_USB_PANIC(Kstub2CcPanicCategory, EPanicUnexpectedState);

		}

	*iReportStatus = KErrNone;	

	User::RequestComplete(iReportStatus, iStatus.Int());	

	}

/**

 * Standard active object cancellation function. Never called because this

 * class has no asynchronous requests.

 */

void CUsbstub2ClassController::DoCancel()

	{

	if (IsActive())

		{

		iTimer.Cancel();	

		}

	switch (iState)

	{

		case EUsbServiceStarting:

			iState = EUsbServiceIdle;

			break;

		case EUsbServiceStopping:

			iState = EUsbServiceStarted;

			break;

		default:	

			_USB_PANIC(Kstub2CcPanicCategory, EPanicUnexpectedState);

	}

	*iReportStatus = KErrNone;		

	User::RequestComplete(iReportStatus, KErrCancel);	

	}

/**

 * Standard active object error function. Never called because this class has

 * no asynchronous requests, and hence its RunL is never called.

 *

 * @param aError The error code (unused)

 * @return Always KErrNone to avoid an active scheduler panic

 */

TInt CUsbstub2ClassController::RunError(TInt /*aError*/)

	{

	__ASSERT_DEBUG( EFalse, _USB_PANIC(Kstub2CcPanicCategory, EUnusedFunction) );

	return KErrNone;

	}

TInt CUsbstub2ClassController::SetUpInterface()

/**

 * Set up the interface for use. This involves finding a "Interrupt IN" 

 * endpoint and, if found, configuring the interface.

 */

	{

	LOGTEXT(_L8(">>CCdcControlInterface::SetUpInterface"));

	TUsbDeviceCaps dCaps;

	TInt ret = iLdd.DeviceCaps(dCaps);

	LOGTEXT(_L8("\tchecking result of DeviceCaps"));

	if ( ret )

		{

		LOGTEXT2(_L8("<<CCdcControlInterface::SetUpInterface ret=%d"), ret);

		return ret;

		}

	const TUint KRequiredNumberOfEndpoints = 1; // in addition to endpoint 0.

	const TUint totalEndpoints = static_cast<TUint>(dCaps().iTotalEndpoints);

	LOGTEXT2(_L8("\tiTotalEndpoints = %d"), totalEndpoints);

	if ( totalEndpoints < KRequiredNumberOfEndpoints )

		{

		LOGTEXT2(_L8("<<CCdcControlInterface::SetUpInterface ret=%d"), 

			KErrGeneral);

		return KErrGeneral;

		}

	// Endpoints

	TUsbcEndpointData data[KUsbcMaxEndpoints];

	TPtr8 dataptr(reinterpret_cast<TUint8*>(data), sizeof(data), sizeof(data));

	ret = iLdd.EndpointCaps(dataptr);

	LOGTEXT(_L8("\tchecking result of EndpointCaps"));

	if ( ret )

		{

		LOGTEXT2(_L8("<<CCdcControlInterface::SetUpInterface ret=%d"), ret);

		return ret;

		}

	// Set the active interface

	TUsbcInterfaceInfoBuf ifc;

	TBool epFound = EFalse;

	for ( TUint i = 0 ; i < totalEndpoints ; i++ )

		{

		const TUsbcEndpointCaps* caps = &data[i].iCaps;

		__ASSERT_DEBUG(caps,_USB_PANIC(Kstub2CcPanicCategory, EPanicUnexpectedStatus));

		if (data[i].iInUse)

			{

			continue;

			}

		if ((caps->iTypesAndDir & (KUsbEpTypeInterrupt | KUsbEpDirIn)) == 

			(KUsbEpTypeInterrupt | KUsbEpDirIn))

			{

			// EEndpoint1 is interrupt endpoint

			ifc().iEndpointData[0].iType  = KUsbEpTypeInterrupt;

			ifc().iEndpointData[0].iDir   = KUsbEpDirIn; 

			//get the max packet size it can potentially support

			//it's possible that it can support Isoch (1023) which is greater

			//than max for Int at 64

			TInt maxSize = Min(caps->MaxPacketSize(), KMaxPacketTypeInterrupt);

			ifc().iEndpointData[0].iSize  = maxSize;

			ifc().iEndpointData[0].iInterval = KPollInterval; 

			epFound = ETrue;

			break;

			}

		}

	LOGTEXT(_L8("\tchecking epFound"));

	if ( !epFound )

		{

		LOGTEXT2(_L8("<<CCdcControlInterface::SetUpInterface ret=%d"), 

			KErrGeneral);

		return KErrGeneral;

		}

	TName ifcName(KIfcName);

	ifc().iString = &ifcName;

	ifc().iTotalEndpointsUsed = KRequiredNumberOfEndpoints;

	// Codes taken from USBCDC 1.1.

	ifc().iClass.iClassNum	  = 0x02; // Table 15- Communication Interface Class

	ifc().iClass.iSubClassNum = 0x02; // Table 16- Abstract Control Model

	ifc().iClass.iProtocolNum = 0x01; // Table 17- Hayes compatible

	LOGTEXT(_L8("\tabout to call SetInterface"));

	// Zero effectively indicates that alternate interfaces are not used.

	ret = iLdd.SetInterface(0, ifc);

	LOGTEXT2(_L8("<<CCdcControlInterface::SetUpInterface ret=%d"), ret);

	return ret;

	}

//

// End of file